Reward and the serotonergic system

Georg Kranz, S. Kasper, R. Lanzenberger

Research output: Journal article publicationLiterature reviewAcademic researchpeer-review

166 Citations (Scopus)

Abstract

Anhedonia, as a failure to experience rewarding stimuli, is a key characteristic of many psychiatric disorders including depression and schizophrenia. Investigations on the neurobiological correlates of reward and hedonia/anhedonia have been a growing subject of research demonstrating several neuromodulators to mediate different aspects of reward processing. Whereas the majority of research on reward mainly focused on the dopamine and opioid systems, a serotonergic mechanism has been neglected. However, recent promising results strengthen the pivotal role of serotonin in reward processing. Evidence includes electrophysical and pharmacological as well as genetic and imaging studies. Primate research using single-unit recording of neurons within the dorsal raphe nucleus argues for a serotonergic mediation of reward value, whereas studies using intracranial self-stimulation point to an important contribution of serotonin in modulating motivational aspects of rewarding brain stimulation. Pharmacological studies using agonists and antagonists of serotonergic receptor subtypes and approaches investigating an increase or decrease of the extracellular level of serotonin offer strong evidence for a serotonergic mediation, ranging from aversion to pleasure. This review provides an argument for serotonin as a fundamental mediator of emotional, motivational and cognitive aspects of reward representation, which makes it possibly as important as dopamine for reward processing. © 2010 IBRO.
Original languageEnglish
Pages (from-to)1023-1035
Number of pages13
JournalNeuroscience
Volume166
Issue number4
DOIs
Publication statusPublished - 14 Apr 2010
Externally publishedYes

Keywords

  • hedonia
  • intracranial self-stimulation
  • motivation
  • pleasure
  • reward
  • serotonin

ASJC Scopus subject areas

  • Neuroscience(all)

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